/Engine/Source/Runtime/Experimental/Chaos/Public/Chaos/Character/CharacterGroundConstraint.h
The damping factor is used to add softness to the vertical constraint between the character and the ground. This can add springiness to landings and slow the rate of step ups. Input should be positive. A value of 0 gives rigid behavior. A value of 1/Dt or above will give maximum softness Units are /T
void SetDampingFactor ( const [FReal](API\Runtime\ChaosCore\Chaos\FReal) & Value )